Magic Formula is a Equip Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, Magic Formula is Unlimited.
YGOPRODeck lists Magic Formula for these formats: OCG GOAT, Duel Links, Speed Duel, Common Charity, Edison, TCG, OCG, Master Duel.
Magic Formula belongs to the Dark Magician archetype—use that tag when searching for engine pieces and tech options.
A listed print of Magic Formula appears in Duel Overload (DUOV-EN087) at Ultra Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Magic Formula is about $0.08 on Cardmarket (prices change frequently).
